BEIJING/SEOUL (Reuters) – Chinese factories were forced to cut prices for the sixth straight month in January to sell their products, while economic growth in South Korea slowed sharply, raising the prospect of more policy easing from major central banks in Asia. The weak manufacturing reading from China added to expectations that Beijing will have to announce fresh stimulus measures soon, and came a day after the European Central Bank took the ultimate leap and launched a huge bond-buying program as it tries to stave off deflation and kick-start growth.